CVE-2015-5477

ISC BIND: Data Processing Errors

As of , CVE-2015-5477 in ISC BIND is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch now.

Exploited
Yes: CISA listed it on 8 October 2026
US federal deadline
11 October 20263 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.91 on 8 October 2026EPSS on the day CISA listed it.
Public exploit
1 Metasploit module and 2 Exploit-DB entries (1 verified)
Fix
Vendor advice: access.redhat.com, supportportal.juniper.net and web.archive.orgLinks below, from CISA's entry.

What CISA says to do

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA's required action

What the flaw is

ISC BIND contains a data processing errors vulnerability that could allow remote attackers to cause a denial of service via TKEY queries.

CISA's description

named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.

The CVE record's description, from mitre

CVE published
29 July 2015
Assigned by
mitre
CVSS
7.5 High (CVSS 3.1, from CISA-ADP)
CWE-617
Reachable Assertion
CWE-19
Data Processing Errors
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

EPSS since listing

0.250.500.750.50: the rank's Patch this week lineListed by CISA0.91 on 8 October 20260.99 since 10 October 2026
EPSS for CVE-2015-5477 since CISA listed it, on the days its value to 2 decimals changed. EPSS scores by FIRST.
Show the numbers
FromEPSS
0.91
0.92
0.99

Timeline

  1. The CVE record was published.
  2. Exploit-DB published an exploit (EDB-ID 37721).
  3. Exploit-DB published an exploit (EDB-ID 37723).
  4. CISA added it to its list of exploited vulnerabilities.
  5. The US federal deadline to fix it.

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

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